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4 years ago

Write a word equation to show how electricity breaks down lead bromide into its elements

Chemistry

1 answer:

Marianna [84]4 years ago

6 0

Answer:

A conducting liquid, containing ions, called the electrolyte (molten lead bromide), must contain the compound (lead bromide) that is being brokendown. The electricity must flow through electrodes dipped into theelectrolyte to complete the electricalcircuit with the battery.

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Atoms of Mg combine with atoms of F to form a compound. Atoms of which of the following elements combine with atoms of F in the

Lena [83]

Answer:

Explanation:

Magnesium is the element of second group and third period. The electronic configuration of magnesium is - 2, 8, 2 or $1s^22s^22p^63s^2$

There are 2 valence electrons of magnesium.

Fluorine is the element of seventeenth group and second period. The electronic configuration of fluorine is - 2, 7 or $1s^22s^22p^5$

There is 1 valence electron of fluorine.

They will combine and form $MgF_2$

The same type of compound is formed by the other members of the group 2 since they will have 2 valence electron.

Group 2 includes:- beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).

Hence, correct options is:- Ba

5 0

4 years ago

What is hydrogen ?,,,

ASHA 777 [7]

Answer:

Hydrogen is the lightest element in the periodic table. Hydrogen is a gas of diatomic molecules and is colorless, odorless, non-toxic, and highly combustible. It is the most abundant chemical substance in the universe as it constitutes roughly 75% of all normal matter.

6 0

3 years ago

Read 2 more answers

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In-s [12.5K]

Answer:

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3 0

4 years ago

Which statements are true? Δ???? for an exothermic reaction is positive. Δ???? for an endothermic reaction is positive. The evap

LuckyWell [14K]

Answer: The true statements are $\Delta H$ for an endothermic reaction is positive, a combustion reaction is exothermic and when energy is transferred as heat from the system to the surroundings, $\Delta H$ is negative.

Explanation:

There are 2 types of chemical reactions categorized into heat change:

Endothermic reactions: These reactions are defined as the reactions in which energy is absorbed by the system from the surroundings. The $\Delta H$ for these reactions is always positive. For Example: Changing of water into water vapor.
Exothermic reactions: These reactions are defined as the reactions in which energy is released by the system to the surroundings. The $\Delta H$ for these reactions is always negative. For Example: Combustion reactions.

Combustion reactions are defined as the reactions in which a hydrocarbon reacts with oxygen gas to produce carbon dioxide and water. Heat is released during these reactions. Thus, it is considered as exothermic reactions.

Hence, the true statements are $\Delta H$ for an endothermic reaction is positive, a combustion reaction is exothermic and when energy is transferred as heat from the system to the surroundings, $\Delta H$ is negative.

6 0

4 years ago

Compare a heterogeneous mixture and a homogeneous mixture

yarga [219]

In a heterogeneous mixture, you can clearly see the distinction between the different substances within the mixture. e.g. fruit salad, paella, nachos

in a homogeneous mixture, it is still made up of different substances, but there is no way of distinguishing between them just from appearances. they have the same uniform composition throughout. e.g. salt water; you know it is made of salt and water, but the salt is dissolved uniformly throughout that you cannot tell.

hope that helps :)

3 0

3 years ago